JP6982384B2 - Management machine - Google Patents

Description

The present invention relates to a technique of a resistance device for imparting running resistance by projecting a resistance rod downward from the rear part of the machine body in a walking type management machine in which a tilling claw is arranged on an axle so that running and tilling can be performed at the same time.

Conventionally, an engine is installed on the body frame in the center of the body of the management machine, a mission case is arranged in the vertical direction at the rear of the engine, and a cultivator shaft that also serves as an axle is supported horizontally in the left-right direction at the bottom of the mission case. There is known a management machine in which a plurality of tilling claws are fixed to the tilling shaft, a resistance rod is projected rearward and downward from the rear part of the mission case, and resistance is applied by the resistance rod when moving forward to enable tilling work. .. Then, a technique has become known in which the resistance rod has a bifurcated tip, the tilling shaft is rotationally driven by the power of the engine, and the tilling work can be performed while imparting running resistance by the resistance rod. (For example, see Patent Document 1).
The resistance rod of the conventional management machine can change the resistance force according to the type, soil quality, working conditions, etc. of the work machine. Loosen the mounting bolt at the base and look at the bifurcated resistance rod from the rear. It was possible to rotate and fix it in a horizontal or vertical state.

Further, in a working machine in which the base portion of the resistance rod is attached and supported near the base portion of the handle, the tip portion of the resistance rod is located in front of the base portion, and the intermediate portion of the tip portion is provided in front of the handle base portion. The tip of the resistance rod is bent rearward and placed so as to face the ground, and the base portion is behind the tip of the resistance rod. A technique in which an auxiliary resistance rod is provided in front of the vertical region of the vertical line is known (see, for example, Patent Document 2).

Utility Model Registration No. 2588129 Jitsufuku 1-40403 Gazette

However, in the case of a resistance rod as in Patent Document 1, if the resistance rods are mounted horizontally in order to increase the resistance and the two resistors are grounded, the ground resistance of the left and right resistors will be different. The direction of travel of the aircraft was bent to the side with higher resistance, a large force was required to correct the direction of travel, and fatigue was also increased. In addition, when the resistance rod is attached vertically, the resistance rod is attached in a horizontal Y shape when viewed from the side, and if the resistance rod is lowered so that the tilling depth becomes deeper, the front tilling device may rise. , The operation was the opposite of the desired operation, making it difficult to work.
Further, in the resistance rod and the sub-resistance rod as in Patent Document 2, the tip thereof is configured to be inclined rearward. In other words, because it is not perpendicular to the ground, it is difficult for it to enter the soil. Therefore, in the cultivating work of hard soil, the resistance rod did not enter deeply and the resistance became small, so that only shallow cultivating work could be performed. Further, since the resistance rod and the auxiliary resistance rod were arranged in front of the mounting base, the stability was poor and the airframe was liable to fall backward.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.
That is, in claim 1, a power source mounted on the machine body, a tilling device that also serves as a traveling device driven by the power source, an operation handle extending to the rear of the machine body, and behind the tilling device. It is a management machine that is arranged and has a resistance device that pierces the soil and imparts resistance to the forward movement of the machine, and the resistance device has at least a first resistance rod and a second resistance rod along the traveling direction of the aircraft. At least the tip of the second resistance rod is arranged behind the mounting base of the resistance device and extends downward in the vertical direction, so that the first resistance rod and the second resistance rod are integrated. The first resistance rod and the second resistance rod are to be pierced into the soil in the upper and lower middle portions of the second resistance rod , which is fixedly fixed and whose tip is arranged behind the mounting base of the resistance device. A stepping portion is provided .

In claim 2, at least the tip of the first resistance rod is obliquely projected forward and downward.
In claim 3, the height of the tip of the first resistance rod and the tip of the second resistance rod to the ground are the same, or the height of the first resistance rod is higher than that of the first resistance rod.

As the effect of the present invention, the following effects are exhibited.
In the past, when the soil reached hard during forward tillage work, a sudden start (so-called dash) sometimes occurred, but immediately after the tiller passed through the hard soil, the first resistance rod on the front side hits the hard soil. Therefore, it was possible to give resistance to the start and prevent the occurrence of dash, and the resistance made it possible to cultivate hard parts. Further, since the second resistance rod is located behind the mounting base, the handle can be operated with a small stroke to pierce the soil. Since a plurality of resistance rods are arranged in the front-rear direction, straightness can be improved, the forward resistance becomes larger than that of a single resistance rod, and it is possible to easily and deeply cultivate. Further, since the resistance device is provided with a stepping portion, the resistance rod can be easily pierced even in a hard field.

The whole side view of the management machine provided with the resistance device of this invention. Perspective view of the resistance device. The side view which shows the 2nd Embodiment of a resistance apparatus. A side view showing the working condition as well. The whole side view of the management machine which shows the other embodiment which provided the stepping part in the resistance device. The perspective view which shows the other embodiment of the stepping part. The whole side view of the management machine equipped with the resistance device of 3rd Embodiment. The side view of the resistance apparatus of 3rd Embodiment. The plan view of the resistance apparatus of 3rd Embodiment. The side view which shows the other embodiment of the 3rd Embodiment.

Next, an embodiment of the management machine 1 provided with the resistance device 40 of the present invention will be described. In addition, the F direction will be described as the front. In FIG. 1, the management machine 1 has an engine 3 mounted on an airframe frame 2, and a mission case 4 is erected at the left and right center portions of the airframe frame 2 at the rear of the engine 3, and the upper part of the mission case 4 and the engine. A transmission case 5 is arranged between the three so that power can be transmitted. A cultivator 6 is laid horizontally in the left-right horizontal direction at the lower part of the mission case 4, that is, a cultivator 6 is provided perpendicular to the F direction which is the traveling direction, and the cultivator 7.7 is provided on the cultivator 6. ... Are fixed radially to form the tiller 10.

The base of the operation handle 8 is fixed to the upper part of the mission case 4 which is the rear part of the machine body, and the operation handle 8 is projected diagonally rearward and upward to form a grip at the rear part of the operation handle 8 so that the operator can perform the operation. A clutch lever, an accelerator lever, and the like are arranged in the vicinity of the grip so that the grip can be gripped. A fuel tank 9 is arranged above the engine 3. Further, the resistance device 40 of the present invention is provided at the rear portion of the airframe frame 2.

Next, the resistance device 40, which is a main part of the present invention, will be described in detail. As shown in FIGS. 1 and 2, the resistance device 40 is composed of a first resistance rod 41 and a second resistance rod 42, and the first resistance rod 41 is composed of a linear round bar body for fixing to the upper part. The pin hole 41a is opened, and the upper portion of the first resistance rod 41 is inserted into the hitch 15 provided at the rear portion of the machine frame 2, and is fixed by the fixing pin 16. However, the fixing structure is not limited, and it may be tightened and fixed at an arbitrary height by bolts, or it may be configured to rotatably support the first resistance rod 41 around the axis.

The first resistance rod 41 extends downward substantially orthogonally from the rear end of the airframe frame 2. That is, the tiller claw 7 of the management machine 1 is grounded to the ground (horizontal plane), and the machine frame 2 is fixed to the machine frame 2 so that the lower end of the first resistance rod 41 is grounded in a substantially horizontal direction. To. In other words, the mounting base 41c at the upper end of the first resistance rod 41 is mounted on the hitch 15 at the rear end of the machine frame 2 and extends downward in the vertical direction.

The second resistance rod 42 is formed by bending a round rod into a substantially V shape, and one end (front end) is fixed to the rear surface of the upper and lower halfway portion of the first resistance rod 41 by welding or the like, and the rear portion (tip) is fixed. It extends downward in the vertical direction and is configured so that the lower end is in contact with the ground. In this way, the first resistance rod 41 and the second resistance rod 42 are configured in a substantially “h” shape in the side view, and the tip end (lower end) of the second resistance rod 42 is arranged behind the mounting base 41c of the resistance device 40. It is extended downward in the vertical direction. The height of the lower end when the second resistance rod 42 touches the ground (height of the tip to the ground) and the height of the lower end of the first resistance rod 41 (height to the ground of the tip) are made to match. In this way, the management machine 1 can be made to stand on its own in a stable state by the tiller 10 and the resistance device 40. Further, the diameters of the second resistance rod 42 and the first resistance rod 41 are the same. In addition, one or more resistance rods are further inserted in front of the first resistance rod 41, behind the second resistance rod 42, or between (or behind) the first resistance rod 41 and the second resistance rod 42. It is also possible to arrange them in parallel to increase the resistance.

Further, a foot can be placed on the upper portion of the second resistance rod 42 located behind the first resistance rod 41 (or the mounting base 41c) so that the resistance device 40 can be easily pierced into the soil. A stepping portion 43 having a size can be provided. In the present embodiment, the stepping portion 43 is fixed on the rear portion of the inclined portion of the second resistance rod 42 so as to be a surface in the left-right direction. Further, as shown in FIG. 5, the rod body is bent and formed in a substantially crank shape in a side view to form one resistance rod 41, and the mounting base at the upper end is fixed to the rear end of the machine frame 2, and the resistance rod 41 is in the middle. It is also possible to fix the stepping portion 43 to the portion so as to be a surface in the left-right direction. In this case, the same effect as when the stepping portion 43 is provided on the second resistance rod 42 can be obtained. However, as long as the resistance rod 41 is composed of one rod and the tip thereof faces downward, the resistance rod 41 may be linear or curved, and its shape is not limited. Further, as shown in FIG. 6, the stepping portion 43 forms a flat surface portion by crushing the inclined portion of the second resistance rod 42 (or one resistance rod 41) in the vertical direction, and this flat surface portion is used as the stepping portion 43. , It is also possible to configure them integrally.

Further, the fixing position of the stepping portion 43 is not limited, and it can be fixed to the rear surface of the vertical portion of the second resistance rod 42 or fixed to the upper rear surface of the first resistance rod 41. Further, the stepping portion 43 can be fixed and detachable by a bolt 44 (FIG. 5) or the like so that the stepping portion 43 can be removed when unnecessary or replaced with a stepping portion 43 having another shape. .. In addition, a plurality of bolt holes are provided in the longitudinal direction for replacement, or the bolt 44 is loosened as a configuration for tightening with the bolt 44 to change the mounting position, mounting angle, etc. of the stepping portion 43, which can be used for the stride length of the operator, etc. It is also possible to make it easier to step on.

In such a configuration, when the tilling work is performed, the operation handle 8 is pushed downward at the work start position, and the lower end of the resistance device 40 is pierced into the soil. At this time, if the soil is hard and cannot be easily pierced by the force of the hand alone, the foot is placed on the stepping portion 43, stepped on, and pierced. In this state, by rotationally driving the tilling shaft 6, the tilling claw 7 bites into the soil and the tilling work can be performed. In a state where the resistance device 40 is deeply pierced so that the machine body does not move forward, the tiller device 10 is rotationally driven on the spot, so that the tiller device 10 can be cultivated deeply, and the more it is rotated, the finer the soil mass can be crushed.

At this time, since the two resistance rods of the first resistance rod 41 and the second resistance rod 42 are pierced into the soil, the forward resistance force becomes larger than before, and the operation handle 8 is pushed down to adjust the forward resistance. The force to do is less than before. In particular, when the soil is hard or there is a mass of soil, a sudden start, so-called dash, may occur. At this time, the lower end of the first resistance rod 41 hits the mass of soil immediately after the tiller 10 passes through the mass of soil. Therefore, sudden start can be suppressed instantly. Further, the second resistance rods 42 are arranged behind the first resistance rods 41 at appropriate intervals so that resistance force is generated in the first resistance rods 41 and the second resistance rods 42. The first resistance rod 41 is located close to the tilling shaft 6 which is the rotation fulcrum of the operation handle 8, and the first resistance rod 41 can be pierced with a smaller pushing force than before by the principle of the lever, and the operability is operability. Is improved.

Further, as in the conventional case, if the first resistance rod 41 and the second resistance rod 42 are arranged on both the left and right sides at the same position in the front-rear direction, if there is a difference in the left and right resistance forces, the left and right sides are left and right. Although the traveling direction may change, in the present embodiment, since the first resistance rod 41 and the second resistance rod 42 are arranged in parallel in the front-rear direction at the center of the left and right sides of the machine, the resistance force in the left-right direction at the time of forward movement is the same. Therefore, straightness is improved.

Then, when advancing from the tilled state of the forward stop while performing the tilling work, the operation handle 8 is lifted a little and the first resistance rod 41 and the second resistance rod 42 are slightly raised to reduce the forward resistance and advance. The tilling work can be performed while adjusting the tilling depth and the size of the soil mass by appropriately adjusting the vertical height of the operation handle 8 while making the operation handle 8.

Further, the lower portion of the first resistance rod 41 and / and the second resistance rod 42 may be sharpened or thinned, or one of them may be long and downwardly projected. That is, the second embodiment will be described with reference to FIGS. 3 and 4. The ground contact portion 41b at the lower part of the first resistance rod 41 is formed in a pointed shape with a sharp lower portion, and the downward protrusion length of the first resistance rod 41 is larger than the downward protrusion length of the second resistance rod 42. It has a long structure. With this configuration, as shown in FIG. 4, even when the field scene is hard, when the operation handle 8 is pushed down and the resistance device 40 is pierced into the soil, the first resistance configured in a sharp shape is formed. The rod 41 can easily enter the soil, eliminating the need to step on it. And since the first resistance rod 41 is pierced into the hard soil, even if the tiller 10 is operated, it does not start suddenly.

When the first resistance rod 41 on the front side is pierced into the soil first and the tilling work is performed while advancing, the second resistance rod 42 on the rear side easily enters the crack formed by the first resistance rod 41 as it advances. As a result, continuous work can be easily performed, and uncultivated land at the rear of the mission case 4 can be treated, and residual cultivation can be eliminated. If the lower end of the second resistance rod 42 on the rear side has a pointed shape, it may be pressed against the foot of the operator, so it is preferable not to form the rear side in a pointed shape. Further, the height of the lower end of the first resistance rod 41 (height to the ground of the tip) may be arranged higher than the height of the lower end of the second resistance rod 42 (height to the ground of the tip). In this case, when the operation handle 8 is pushed down during normal tilling work, the first resistance rod 41 mainly imparts resistance when the height of the lower end of the first resistance rod 41 is lower than the lower end of the second resistance rod 42. The second resistance rod 42 has little resistance and has a low existence value. However, by arranging the lower end height of the first resistance rod 41 higher than the lower end height of the second resistance rod 42, the operation handle 8 can be arranged. When pushed down, the second resistance rod 42 goes deeper into the soil than the first resistance rod 41, and the second resistance rod 42 mainly imparts resistance during tilling. The first resistance rod 41 is not inserted deeply, but in a hard field, resistance is applied and dashing can be prevented. Further, when a dash occurs, the first resistance rod 41 on the front side hits the hard soil immediately after the cultivator 10 passes through the hard soil, and resistance to a sudden start can be given to prevent the occurrence of a dash. The resistance also makes it possible to cultivate hard parts.

Next, the resistor device 50 of the third embodiment will be described with reference to FIGS. 7, 8 and 9. The resistance device 50 includes a first resistance rod 51, a second resistance rod 52, a tail wheel 53/53, and a mounting bracket 54. The mounting bracket 54 includes a columnar mounting base 54a to be mounted on the hitch 15, a support boss 54b for mounting the rotating shaft 57, the first resistance rod 51, and the like, and a connecting body 54c for connecting the mounting base 54a and the support boss 54b.

The mounting base 54a has a cylindrical pin hole 54d opened at the upper portion thereof, and the mounting base 54a is inserted into a cylindrical portion formed at the rear of the hitch 15 to form one of a plurality of pin holes opened in the hitch 15. The pin holes 54d are aligned at a desired height and can be fixed by the fixing pin 16. That is, the height of the resistance device 50 can be adjusted according to the tilling depth. A predetermined difference (gap) is provided between the outer diameter of the fixing pin 16 and the inner diameter of the pin hole 54d. That is, the diameter of the fixing pin 16 is made smaller than the inner diameter of the pin hole 54d so as to have play.

With this configuration, the first resistance rod 51 and the second resistance rod 52 attached to the mounting bracket 54 can rotate slightly to the left and right by the angle of play, even if they hit stones or hard residual cultivation. It is designed to prevent the finish from being disturbed by rotating to the right or left so that the running does not stop and there is no difference in the tilling depth.

A plate-shaped connecting body 54c is projected diagonally upward from the lower end of the mounting base portion 54a, and the front and lower surfaces of the support boss 54b are fixed to the rear end of the connecting body 54c. The axial center O1 of the support boss 54b is set to be diagonally downward in the front-rear direction. A locking means 60 for fixing the first resistance rod 51 at a predetermined angle position is provided on the side surface of the support boss 54b.

The locking means 60 is composed of a support 61, a lock pin 62, and a spring 63. The support 61 has a plate bent in a "U" shape, and the open side is fixed to the side surface of the support boss 54b, and the closed side is the side. The lock pin 62 is inserted from the side so that the support boss 54b and the rotation shaft 57 described later can be penetrated and fixed. A spring 63 is externally fitted to the lock pin 62 in the support 61 so as to urge the lock pin 62 to the support boss 54b side (lock side). However, the configuration of the locking means 60 is not limited, and the support boss 54b and the rotating shaft 57 may be fixed by bolts or the like.

A rotation shaft 57 that supports the first resistance rod 51, the second resistance rod 52, and the tail wheel 53 is rotatably inserted into the support boss 54b of the mounting bracket 54, and the rotation shaft 57 is designated by the locking means 60. It is fixed at the angle position of. That is, a pin hole is opened in the rotary shaft 57 in the radial direction, and the lock pin 62 can be inserted and fixed after the rotary shaft 57 is inserted into the support boss 54b. A predetermined difference is provided between the inner diameter of the pin hole of the rotating shaft 57 and the outer diameter of the lock pin 62, and the lock pin 62 is fixed with play. That is, the outer diameter of the lock pin 62 is made smaller than the inner diameter of the pin hole of the rotating shaft 57 to the extent that play occurs, so that the first resistance rod 51 and the second resistance rod 52 can rotate slightly to the left and right. .. In this way, as described above, even if the first resistance rod 51 and the second resistance rod 52 are hit by stones or hard residual tillage, they can be prevented from rotating to the right or left and escaping to stop running, and the mounting base portion. The play at the two locations of the 54a and the rotating shaft 57 further expands the escape range compared to the conventional case, improves the residual cultivation treatment performance, and prevents the running from stopping.

At the rear end of the rotating shaft 57, the base side of the first resistance rod 51 is fixedly fixed so as to be orthogonal to each other, and the first resistance rod 51 is composed of a rod body and is arranged so as to have a forward-sloping forward leaning posture. Will be set up. That is, the first resistance rod 51 is mounted so as to project diagonally forward and downward from the rear portion of the mounting bracket 54, and one end (front end) serves as an insertion portion into the soil and is positioned forward and downward from the mounting portion of the hitch 15. However, when moving forward, it is easy to pierce the soil. However, as shown in FIG. 10, the first resistance rod 51 may be arranged in the vertical direction so that only the tip of the first resistance rod 51 projects diagonally forward and downward. The second resistance rod 52 protrudes rearward and downward from the middle portion in the longitudinal direction of the first resistance rod 51. The second resistance rod 52 is formed by bending the rod body into a substantially V-shape in a side view, and the lower portion extends downward in the vertical direction. That is, the lower tip portion of the second resistance rod 52 is configured to face in the vertical direction.

The other end (upper end) of the first resistance rod 51 is a tail wheel frame 58, and an axle 55 is laterally installed at the tip of the tail wheel frame 58 in the left-right direction. In the present embodiment, the tail wheel frame 58 and the first resistance rod 51 are integrally formed on the extension of one rod body, but they can also be configured by different members. Tail wheels 53 and 53 are rotatably supported on both sides of the axle 55. A mounting plate 56 for mounting the ridger 70 is fixedly installed at the center of the left and right sides of the axle 55. The ridger 70 or the tail wheel 53 may not be provided, or the tail wheel 53 may be a single wheel.

In such a configuration, in a state where the rotating shaft 57 is fixed so that the first resistance rod 51 and the second resistance rod 52 face downward, the first resistance rod 51 and the second resistance rod 52 are in the soil during the tilling work. The field is cultivated by rotating the tilling claws 7.7 ... Then, as in the conventional case, in the configuration in which the first resistance rod 51 is inclined in the vertical direction or the rearward downward direction, the first resistance rod 51 may escape upward and a dash may occur when the hard portion is reached. 1 When the resistance rod 51 is configured to project diagonally forward and downward downward, it is possible to prevent dashing because it advances so as to bite into the soil even if it reaches a hard field.

Further, when the tilling claws 7.7 ... cannot move forward even though they are rotating, the first resistance rod 51 can rotate to the right or left to escape and move forward due to the backlash. In this way, it is possible to prevent the work from being interrupted or the plowing depth from becoming deeper. When moving during non-working, pull out the lock pin 62 to unlock it, rotate it 180 degrees around the rotation shaft 57 so that the tail wheel 53 is located below, and insert the lock pin 62 to fix it again. , The resistance device 50 can be switched from the working position to the moving position. At this moving position, the operating handle 8 is lowered to lift the tiller 10 from the ground surface and only the tail wheel 53 is grounded so that the tail wheels 53 and 53 can easily move.

As described above, the engine 3 which is a power source mounted on the airframe consisting of the airframe frame 2 and the mission case 4, the cultivator 10 which also serves as the traveling device driven by the engine 3, and the tilling device 10 extending to the rear of the airframe. It is a management machine 1 provided with an operation handle 8 to be operated, and resistance devices 40 and 50 arranged behind the tiller 10 and piercing the soil to impart resistance to the forward movement of the machine, and the resistance devices 40 and 50. Is provided with at least a first resistance rod 41.51 and a second resistance rod 42.52 along the traveling direction of the airframe, and at least the tip of the second resistance rod 42.52 is behind the mounting base 41c / 54a of the resistance device 40. When the cultivator 10 reaches hard soil during tilling work, the forward speed suddenly increases, but immediately after passing through the hard part, it is placed in the soil and extended downward in the vertical direction. Since the first resistance rods 41 and 51 on the front side hit the hard soil, it was possible to give resistance to rapid advance and prevent the occurrence of dash, and the resistance made it possible to cultivate the hard part. Further, since the second resistance rods 42 and 52 are located behind the mounting bases 41c and 54a, the operation handle 8 can be operated with a small stroke to pierce the soil. Since two first and second resistance rods 41, 51, 42, 52 or three or more resistance rods are arranged in the front-rear direction, straightness can be improved and forward resistance is higher than that of one resistance rod. It is larger than the conventional one, and the operation of pushing down the operation handle 8 to increase the resistance is reduced, and the operability is improved. Further, since the two first and second resistance rods 41, 51, 42, and 52 are located in the front-rear direction at the center of the left and right, the left and right resistance forces do not change, and the straightness is improved.

Further, since at least the tip of the first resistance rod 51 is obliquely projected forward and downward, the first resistance rod 51 bites into the ground when moving forward (easily bites into the soil), and when it reaches hard soil, the first resistance rod 51 It is possible to prevent the 51 from sticking into a hard portion and rising and dashing. In addition, it is easy to pierce and crush the residual cultivation.

Further, the heights of the tips of the first resistance rods 41 and 51 and the tips of the second resistance rods 42 and 52 are the same, or the first resistance rods 41 and 51 are arranged higher, so that they are normally cultivated. When the operation handle 8 is pushed down during work, the second resistance rods 42 and 52 enter deeper into the soil than the first resistance rods 41 and 51, and the first resistance rods 41 and 51 impart meaningless resistance. Can be avoided. That is, when the first resistance rods 41 and 51 enter the soil deeper than the second resistance rods 42 and 52, the role of the second resistance rods 42 and 52 decreases and the value of existence also decreases, but the second resistance By configuring the rods 42 and 52 to penetrate deeper than the first resistance rods 42 and 51, the second resistance rods 42 and 52 provide resistance during tilling, and the first resistance rod 51 has a function of preventing dashing. And each can work effectively.

Further, since a stepping portion 43 for piercing the resistance rod is provided in the upper and lower middle portions of the resistance rod arranged behind the mounting base portion 41c, the stepping portion 43 can be used even in hard soil. By placing and stepping on it, the first resistance rods 41 and 51 and the second resistance rods 42 and 52 can be easily pierced into the field, and the operability can be improved.

2 Aircraft frame 3 Engine 4 Mission case 8 Operation handle 10 Tiller 40 Resistance device 41.51 1st resistance rod 41c Mounting base 42/52 2nd resistance rod 43 Stepping part

Claims (3)

A power source mounted on the aircraft, a tiller that also serves as a traveling device driven by the power source, an operation handle that extends to the rear of the aircraft, and an operation handle that is placed behind the tiller and pierces the soil to pierce the aircraft. It is a management machine equipped with a resistance device that imparts resistance to the forward movement of the
The resistance device includes at least a first resistance rod and a second resistance rod along the traveling direction of the airframe, and at least the tip of the second resistance rod is arranged behind the mounting base of the resistance device and is also arranged. It is extended downward in the vertical direction,
The first resistance rod and the second resistance rod are integrally fixed and fixed .
A stepping portion for piercing the first resistance rod and the second resistance rod into the soil is provided in the upper and lower middle portions of the second resistance rod whose tip is arranged behind the mounting base of the resistance device. A management machine featuring. The management machine according to claim 1, wherein at least the tip of the first resistance rod is obliquely projected forward and downward. Claim 1 or claim 2 is characterized in that the height of the tip of the first resistance rod and the tip of the second resistance rod to the ground are the same, or the first resistance rod is arranged higher. The management machine described in.

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